I'd highly recommend to use your own mod id (UsefulCrops) for owner, it's designed to give everyone a dedicated namespace to avoid conflicts.
You may want to consider adding crops for gold, diamond, uranium and other resources as well 
Speiger: This forum is dedicated for crop card implementations / mods.
BakermanLP: I thought it was a server side issue, but apparently not.. Try build 51, it has the clientside login trigger implemented as well. To enable it you'll have to join a sp world first to run "/csampler trigger login"
SvEgiiVEteR: That's just an informative warning. I'll have to check with xcompwiz if there's a potential issue and make the warning more selective. It's not active for release builds anyway.
BakermanLP: I've updated the trigger feature to allow capturing logins, see version 1.50 and "/sampler trigger login". It'll capture every login, but the first number in the filename has the spike length in ms, so you should eventually see a problematic one. I'd like to have a look at the nps file if you manage to obtain a sample for a long pause.
Fabisch: Since your wording implies a question, go ahead, no need to ask 
CCC only does translation of method and field names+accesses, just like SpecialSource in the Forge build. It can't properly handle reflection and bytecode manipulating code unless this code is already capable of running in-dev without changes, which isn't the case with FC.
No, that'd require a build with deobf names, which I don't have available atm. None of the remappers with on-the-fly remapping will work.
This should be fine, except for the null checks. The recipe implementation behind GameRegistry.addRecipe takes Block, Item or ItemStack instances.
A potential issues why this may not work is if you do this from the PreInitialization event, which is too early to assume IC2 to have its stuff loaded. Use the Initialization event instead.
New build: http://files.player.to/tmp/fastcraft-1.22-ctest17.jar
It fixes compatibility with the NotEnoughIDs mod, version 1.3.1 or later (unreleased at the time of writing).
Could I use your mod (Fastcraft) in Complexity (a new modpack coming to Technic Launcher)?
Just follow the redistribution terms and it'll be ok. Asking isn't needed.
A fairly obvious problem with the idea is that energy is really quite ubiquitous, especially if you are looking outside IC2 or at long term players. Servers would have to actively restrict production to make it a valuable asset.
For items it's not as bad, but still mods aren't nowhere near the large MMOs in terms of how many items can be acquired and the difficulty of doing so. Things like rare drops are scaling by building some automation to get them, e.g. mob farms, not by play time. Even if there were such drops, MC's progression is way to shallow, there's not nearly enough difficult scenarios that warrant much better equipment. Trading commodity type items will probably just shorten the game for players starting later.
This being said, I don't think the idea has sufficient application potential without increasing the game's depth first. For the few things worth trading the basic Forestry post box system or Trade-O-Mats are IMO enough.
No that's wrong, look at the crash log in the OP. It's crashing from the vanilla source iterator, not IC2's.
The issue you are talking about is completely unrelated and has been fixed a long time ago.
ctest14 is only ok because it doesn't have the specific validation code enabled. Does the issue happen happen repeatedly? If yes I could use a copy of your instance and a description on how to trigger the issue.
What? IC2 is not using SoundManager and thus SoundManager.tickableSounds at all, there's no way it can possibly cause the crash linked. I completely bypass anything from Mojang and use SoundSystem directly.
And a new build: http://files.player.to/tmp/fastcraft-1.22-ctest15.jar
Mostly bug and compatibility fixes.
This is can't be related to build 782 code-wise, it's just a coincidence.
The issue itself should at most cause a block to be unable to transfer energy. I don't know why it's breaking for you, there's various options including other mods doing nasty things.
IC2 doesn't actually use MC's sound manager, the issue is most likely elsewhere.
For certus quartz or other worldgen items you may want to take a look at the command "/ic2 uu-world-scan medium", which will generate uu values specifically for your mod list and configs. The command is best run on a copy of your world since there may potentially be corruption issues.
